Our regular roundup of sci-tech stories from across the web includes: massive solar energy plants, using Facebook to get a job, and one man's attack on Georgia's cyber infrastructure. Let's kick it off:

Jobs –The social network as a career safety netIf you have avoided social-networking sites like LinkedIn and Facebook with the excuse that they are the domain of desperate job hunters or attention-seeking teenagers, it's time to reconsider. In a world of economic instability and corporate upheaval, savvy professionals like the technology consultant Josh So epitomize the benefits of brushing up your online image and keeping it polished. [via NYTimes]

War – How I became a soldier in the Georgia-Russia cyberwar
Having read so many contradicting accounts, I knew that the only reliable way to find out what was really happening was to enlist in the Russian digital army myself. [via Slate]From the Monitor's archive – Anatomy of a cyberwar in Georgia: "While the Russian government or military may yet be found to be playing a part, criminal gangs or savvy computer hackers in Russia ('hackivists') may be acting on their own."

Economics – Beware the strengthening dollarThe steady crumbling in the value of the US dollar over the last two years has given a big boost to reported earnings at many American companies that sell goods overseas in local currencies but report in dollars. [via Barron's]